Scraper



D. R. THROOP.

SCRAPER.

APPLICATION FILED OCT. 14, 1918.

Patented Feb. 10, 1920.

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SCRAPER.

v; APPLICATION FILED OCT. 14, I918. 10,

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DAMON R. THROOP, 0E DAVIS, CALIFORNIA.

SGBAPEB.

Specification of Letters Patent.

Patented Feb. 10, 1920.

Application filed October 14, 1918. Serial 110,257,989.

To all whom it may concern:

Be it known that I, DAMON R. THROOP, a citizen of the United States, residing at Davis, in the county of Yolo and State of California, have invented a new and useful Scraper, of which the following is a specification.

The subject of this invention is a scraper intended for use in leveling and checking land, and more especially useful in preparing land for irrigation.

The main object of the invention is to provide a scraper, capable of dumping earth in ridges or checks, with means for raising and lowering the scraper blade when desired so that earth may be delivered thereunder and spread to a desired thickness.

Another object of the invention is the provision of means for holding the scraper blade in any desired position.

The invention also contemplates generally improving the construction and enhancing the utilitv of wheel supported scrapers.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

A practical structure for carrying out the invention is shown in the accompanying drawings, wherein:

Figure 1 is a view in side elevation of a scraper constructed in accordance with the invention, a portion broken out for convenience and economy of space;

Fig. 2 is a plan view of the same;

Fig. 3 is a view in rear elevation, portions Fig. 4. is a view in rear elevation of the scraper blade.

Referring to the drawings by numerals of reference In carrying out the invention there is provided a frame formed of two bars, 1, preferably of channel iron, which are arranged for a portion of their length in spaced arallelism and then converge forwardly to ds 2 which are disposed angularly to the converging portions that the portions 2 may be in contact longitudinally. A draw head 3 is secured by bolts 4, or otherwise, to the ends of the portions 20f the bars 1.

To the parallel portions of the bars 1 are secured, by rivets 5 or the like, the flooring members or boards 6, which form a platform upon which the operator of the machine may stand. A cross brace 7 is secured between the bars 1, at the forward end of the platform, to lend proper rigidity and strength to the structure.

An axle 8 extends through apertures formed in the bars 1, between the ends of the parallel portions thereof, and the axle is arranged transversely of the machine with its ends extending laterally of the bars 1. Mounted to'rotate on the extending ends of the axle 8 are the supporting wheels 9 which render transportation of the device less difficult. '3

T he forward ends of side beams 11, which may also be of channel iron, have pivotal engagement with the extending ends of the axle 8, and are held thereon in spaced relation to the wheels by collars 10. The rear ends of these side beams 11 are apertured to pivotally receive the ends of the shaft of a scraper blade. This scraper blade is composed of a shaft 12, preferably formed of gas pipe or other'hollow stock material, and extending longitudinally of the shaft, and located at diametrically opposite positions thereon, are the boards or planks 13, which are bound rigidly" in place u on the shaft by the straps 14:, of metal or t he like, which are secured transversely of the scraper blade by like. The remote longitudinal edges of the planks 13 are beveled and a metal strip 15 is secured along each cutting'edge .by rivets or otherwise for the purposeofprotecting the cutting edge from injury.

The ends of the shaft 12 extend laterally beyond the side beams 11', and to these ends are rigidly secured the pawls or cross arms 16, clamps 17 being provided for the purpose of securing them in place. arms 16 are positionedsixtv degrees apart, and a like angular distance from the scraper blade so that, when the blade is released to rotate, as will be hereinafter described, the

means of rivets or the The cross end of which treadle is .to the central upright 21 adjacent its lower ends of the cross arms will successively engage the ground and return the blade to proper operative position. The. arm 16 may be kept in proper spaced relation to the side beams 11 by means of spacing collars 18. I

In order that earth collected before the s craperlblade maybe properly retained in place and prevented from escaping beyond each end of the blade, retaining plates 19, formed of boiler plate or the like, are sultably secured-to the side beams 11 in position to have their lower edges in contact with the ground-when the scraper blade is in operative. position.

Mounted transversely of the rear ends of the bars 1, is a beam 20, to which are se- ,cured and from'which rise the uprights 21, "preferably three in number, and located respectively at each end and near the longitudinal center of the beam. 20. Struts or brace bars 22 are secured to the upper ends of the end uprights 21, and extend downwardly and forwardly therefrom, and the forward endsof these struts are secured to I braces 23, which are secured to and extend fromthe bars .1 and have their rear ends apertured fto receive the ends of the axle 8. These braces 23 serve to support and brace the axleto resist the strain due to cutting and. transporting earth.

- Journal boxes 24 are secured to the uprights 21, near the upper ends thereof, and

. serve asaljournaling means for a horizontally disposed shaft 25. A hand. wheel 26 is rigidlysecured on the shaft 25, at a point between the ends of the shaft, and a brake drum 27 is rigid on the shaft in juxtaposition to the wheel. A brake strap or band 28 has one endsecured to a bracket 29, which bracket is secured to the central upright 21, andfpasses about the drum with its other end connected by alink 30 to a treadle 31, one

pivotally connected end. -As will be: readily understood from the .Iforegoing, the shaftl25 may be rotated by .means of the hand wheel 26, andthe shaft Qheldin any-rotated position by pressure of is'had for thelpurpose of. raising or lower- Ithe :foot on the treadle 31. This operation ing-the scraper blade and its supporting wframeithrongh means of the mechanism now Qare rigidly secured on formed longitudinally th de l onsrwill therefore, tendto ,raise or lower atherods to'be described A v I I The ends ,of the shaft 25 extend laterally beyondthe end uprights 21, and pinions 32 these extending ends. l'llhe pinions 32 mesh with racks 33, which are ofrods 34, the lower with-blocks 35, secured to the rear ends of beamsgll. Revolution of the pin- :34, asrthacase maybe, and so raise or lower the scraper. In order that the racks ends-of which rodshave pivotalconnection 33 may be kept in mesh with the pinions 32,

blade in operative position and releasing the same at will, a lever 38 is pivotally s ecured to the central upright and has a treadle 39 formed on its forward end to be engaged by the foot of the operator, while on its under side, and towardits rear. end, is. provided a shouldertO, which forms;a.catchagainst which the scraper blade strikes and which restrains the blade ,against rotation. .,A retractile spring 41 has one end connected to the under face .of thelever 38,,rearw ardly of its pivot point, and its other endsecured to the beam 20, or other suitablepart'of the framework of the machine, and serves toretain the lever in scraper blade engaging position. 1 v, s In practicethe machine'is operated in the following manner A tractor, or other source of motive power, is hitched tothe draw, headj 3 pose of transporting the scraper over. the field .or land which istobeoperated upon.

The-scraper blade isv set as shown in. Fig. 1 and the machine drawn. forward,,.Whi,ch will cause earth to; accumulatebeforethe blade. If it is desiredto depositl-thev'earth in, a thin ,layerrover certain. parts, .of the work, the. hand wheel 26 isturnedwuntilthe scraper blade is raised the required distance, when the earth will escape beneath. the scraper blade and will be spread thereby.

When it is desired to deposit the, earth ,in ridges to form checks, or for other ,purposes, the scraper blade isreleased bypressing downwardly on the lever38.- When the scraper blade is released,the weight of earth before the blade willv causetheblade torock and release the earth. When thisjtakes place the ends of the cross, arms 16 engage the earth andv cause theblade to rock to again assume operative position. I-llaving thustdescribed the invention, ,yvhat is claimed as new and sought by Letters Patent, is 1. A scraper, including a: transportable frame,=a scraper blade mounted vfor rotation in the frame, releasable means for locking the blade against rotation, angularly .disposed radial arms revolublewith the blade and engageable with the ground for automatically restoring the blade, whenreleased, to operative position, and means for raising and lowering the blade. W 2. A scraper including.afmovablejstructure, side beams pivotally, connected "to" said structure, a shaft journaled therein, a reshaft and revoluble therewith, "said "arins ,for. the purand the scraper being disposed out of transing the shaft and inverting the scraper when 10 verse alinementand adapted successively to the scraper is released. engage the ground, means engaging one In testimony that I claim the foregoing edge of the scraper for holding the shaft as my oWn, I have hereto afiixed my signaand scraper against rotation, means under ture in the presence of two Witnesses.

the control of the operator for raising and DAMON R. THROOP. lowering the shaft and side beams, and Witnesses: means for releasing the scraper, said scraper AMY HAHN,

and its arms constituting means for rotat- HAZEL PLEASANTS. 

